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Finding the Fourth Proportional to 145,347.95, 200,555.85 and 80,815.39

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Solution

The fourth proportional to 145,347.95, 200,555.85 and 80,815.39 is: 111,511.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,347.95 : 200,555.85 = 80,815.39 : x
  2. Step 2: Convert to fraction form
    145,347.95/200,555.85 = 80,815.39/x
  3. Step 3: Cross multiply
    145,347.95x = 200,555.85 × 80,815.39
  4. Step 4: Simplify right side
    145,347.95x = 16,207,999,036.20
  5. Step 5: Solve for x
    x = 16,207,999,036.20/145,347.95
  6. Step 6: Final answer
    x = 111,511.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.